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Variation in genome size and karyotype among closely related aphid parasitoids (Hymenoptera, Aphelinidae)

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Variation in genome size and karyotype among closely related aphid parasitoids (Hymenoptera, Aphelinidae)

by
Gokhman, Vladimir E.; Kuhn, Kristen L.; Woolley, James B.; Hopper, Keith R.

Publication date
Usage
Attribution 4.0 InternationalCreative Commons Licenseby
Topics
Aphelinidae, Aphelinus, parasitoid, genome size, flow cytometry, karyotype
Publisher
Pensoft Publishers
Collection
biodiversity
Contributor
Pensoft Publishers
Language
English
Rights
https://biodiversitylibrary.org/permissions
Rights-holder
Copyright held by individual article author(s).
Volume
11
Item Size
20.1M
Abstract
Genome sizes were measured and determined for the karyotypes of nine species of aphid parasitoids in the genusAphelinusDalman,1820. Large differences in genome size and karyotype were found betweenAphelinusspecies, which is surprising given the similarity in their morphology and life history. Genome sizes estimated from flow cytometry were larger for species in theAphelinusmali(Haldeman, 1851) complex than those for the species in theAphelinusdaucicolaKurdjumov, 1913 andAphelinusvaripes(Förster,1841) complexes. Haploid karyotypes of theAphelinusdaucicolaandAphelinusmalicomplexes comprised five metacentric chromosomes of similar size, whereas those of theAphelinusvaripescomplex had four chromosomes, including a larger and a smaller metacentric chromosome and two small acrocentric chromosomes or a large metacentric and three smaller acrocentric chromosomes. Total lengths of female haploid chromosome sets correlated with genome sizes estimated from flow cytometry. Phylogenetic analysis of karyotypic variation revealed a chromosomal fusion together with pericentric inversions in the common ancestor of theAphelinusvaripescomplex and further pericentric inversions in the clade comprisingAphelinuskurdjumoviMercet, 1930 andAphelinushordeiKurdjumov, 1913. Fluorescencein situhybridization with a 28S ribosomal DNA probe revealed a single site on chromosomes of the haploid karyotype ofAphelinuscoreaeHopper & Woolley, 2012. The differences in genome size and total chromosome length between species complexes matched the phylogenetic divergence between them.
Addeddate
2025-03-16 15:24:53
Bhl_virtual_titleid
210879
Bhl_virtual_volume
v.11:no.1 (2017)
Call number
10_3897_CompCytogen_v11i1_10872
Call-number
10_3897_CompCytogen_v11i1_10872
Foldoutcount
0
Genre
article
Identifier
variationgenome11gokh
Identifier-ark
ark:/13960/s2838b84365
Identifier-bib
10_3897_CompCytogen_v11i1_10872
Identifier-doi
10.3897/CompCytogen.v11i1.10872


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